I have recently upgraded from FC14 to FC15. Under FC14, I successfully ran deja-dup backups of my (large) home directory. Under FC15, I was able to restore my /home successfully.
I just tried to create a full system backup to a 1Tb external drive mounted under /media/[drive name]/[directory which exists] (excluding the obvious candidates like /media, /proc, /dev, ...), running deja-dup from a command line as root. After performing the full system scan, it started creating backup files in the target directory, up to and including an archive file named "duplicity-full.20110903T030853Z.vol46.difftar.gz", but crashed with the following message:
Backup location ‘/tmp/duplicity-adH0ZV-tempdir/mktemp-su5dbi-49’ does not exist.
I have 2Gb RAM and 34Gb+ free in /tmp, 500Gb+ free on the target drive. The duplicity-full* files are only 30Mb each, so it is hard to see how it could be a problem with memory or disk.
Any ideas, folks? Is deja-dup not up to the task?